After extraction separation of gold by MIBK, lead, copper, iron, nickel in gold plating bath were determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES).

Experiments were carried out to explore the extraction conditions of the water bath shaking method of total flavonoids from bitter melon, which was as raw materials.

Compared with the ultrasonic extraction and water bath extraction method, the microwave-assisted extraction was time saving and more efficient.